1 files changed, 573 insertions, 0 deletions

diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
new file mode 100644
index 000000000..b4d0bfc83
--- /dev/null
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
@@ -0,0 +1,573 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013 Red Hat
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#include <linux/delay.h>
+
+#include <drm/drm_vblank.h>
+
+#include "msm_drv.h"
+#include "msm_gem.h"
+#include "msm_mmu.h"
+#include "mdp4_kms.h"
+
+static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev);
+
+static int mdp4_hw_init(struct msm_kms *kms)
+{
+	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+	struct drm_device *dev = mdp4_kms->dev;
+	u32 dmap_cfg, vg_cfg;
+	unsigned long clk;
+	int ret = 0;
+
+	pm_runtime_get_sync(dev->dev);
+
+	if (mdp4_kms->rev > 1) {
+		mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER0, 0x0707ffff);
+		mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER1, 0x03073f3f);
+	}
+
+	mdp4_write(mdp4_kms, REG_MDP4_PORTMAP_MODE, 0x3);
+
+	/* max read pending cmd config, 3 pending requests: */
+	mdp4_write(mdp4_kms, REG_MDP4_READ_CNFG, 0x02222);
+
+	clk = clk_get_rate(mdp4_kms->clk);
+
+	if ((mdp4_kms->rev >= 1) || (clk >= 90000000)) {
+		dmap_cfg = 0x47;     /* 16 bytes-burst x 8 req */
+		vg_cfg = 0x47;       /* 16 bytes-burs x 8 req */
+	} else {
+		dmap_cfg = 0x27;     /* 8 bytes-burst x 8 req */
+		vg_cfg = 0x43;       /* 16 bytes-burst x 4 req */
+	}
+
+	DBG("fetch config: dmap=%02x, vg=%02x", dmap_cfg, vg_cfg);
+
+	mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_P), dmap_cfg);
+	mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_E), dmap_cfg);
+
+	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG1), vg_cfg);
+	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG2), vg_cfg);
+	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB1), vg_cfg);
+	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB2), vg_cfg);
+
+	if (mdp4_kms->rev >= 2)
+		mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG_UPDATE_METHOD, 1);
+	mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG, 0);
+
+	/* disable CSC matrix / YUV by default: */
+	mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG1), 0);
+	mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG2), 0);
+	mdp4_write(mdp4_kms, REG_MDP4_DMA_P_OP_MODE, 0);
+	mdp4_write(mdp4_kms, REG_MDP4_DMA_S_OP_MODE, 0);
+	mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(1), 0);
+	mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(2), 0);
+
+	if (mdp4_kms->rev > 1)
+		mdp4_write(mdp4_kms, REG_MDP4_RESET_STATUS, 1);
+
+	pm_runtime_put_sync(dev->dev);
+
+	return ret;
+}
+
+static void mdp4_enable_commit(struct msm_kms *kms)
+{
+	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+	mdp4_enable(mdp4_kms);
+}
+
+static void mdp4_disable_commit(struct msm_kms *kms)
+{
+	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+	mdp4_disable(mdp4_kms);
+}
+
+static void mdp4_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
+{
+}
+
+static void mdp4_flush_commit(struct msm_kms *kms, unsigned crtc_mask)
+{
+	/* TODO */
+}
+
+static void mdp4_wait_flush(struct msm_kms *kms, unsigned crtc_mask)
+{
+	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+	struct drm_crtc *crtc;
+
+	for_each_crtc_mask(mdp4_kms->dev, crtc, crtc_mask)
+		mdp4_crtc_wait_for_commit_done(crtc);
+}
+
+static void mdp4_complete_commit(struct msm_kms *kms, unsigned crtc_mask)
+{
+}
+
+static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate,
+		struct drm_encoder *encoder)
+{
+	/* if we had >1 encoder, we'd need something more clever: */
+	switch (encoder->encoder_type) {
+	case DRM_MODE_ENCODER_TMDS:
+		return mdp4_dtv_round_pixclk(encoder, rate);
+	case DRM_MODE_ENCODER_LVDS:
+	case DRM_MODE_ENCODER_DSI:
+	default:
+		return rate;
+	}
+}
+
+static void mdp4_destroy(struct msm_kms *kms)
+{
+	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+	struct device *dev = mdp4_kms->dev->dev;
+	struct msm_gem_address_space *aspace = kms->aspace;
+
+	if (mdp4_kms->blank_cursor_iova)
+		msm_gem_unpin_iova(mdp4_kms->blank_cursor_bo, kms->aspace);
+	drm_gem_object_put(mdp4_kms->blank_cursor_bo);
+
+	if (aspace) {
+		aspace->mmu->funcs->detach(aspace->mmu);
+		msm_gem_address_space_put(aspace);
+	}
+
+	if (mdp4_kms->rpm_enabled)
+		pm_runtime_disable(dev);
+
+	kfree(mdp4_kms);
+}
+
+static const struct mdp_kms_funcs kms_funcs = {
+	.base = {
+		.hw_init         = mdp4_hw_init,
+		.irq_preinstall  = mdp4_irq_preinstall,
+		.irq_postinstall = mdp4_irq_postinstall,
+		.irq_uninstall   = mdp4_irq_uninstall,
+		.irq             = mdp4_irq,
+		.enable_vblank   = mdp4_enable_vblank,
+		.disable_vblank  = mdp4_disable_vblank,
+		.enable_commit   = mdp4_enable_commit,
+		.disable_commit  = mdp4_disable_commit,
+		.prepare_commit  = mdp4_prepare_commit,
+		.flush_commit    = mdp4_flush_commit,
+		.wait_flush      = mdp4_wait_flush,
+		.complete_commit = mdp4_complete_commit,
+		.get_format      = mdp_get_format,
+		.round_pixclk    = mdp4_round_pixclk,
+		.destroy         = mdp4_destroy,
+	},
+	.set_irqmask         = mdp4_set_irqmask,
+};
+
+int mdp4_disable(struct mdp4_kms *mdp4_kms)
+{
+	DBG("");
+
+	clk_disable_unprepare(mdp4_kms->clk);
+	if (mdp4_kms->pclk)
+		clk_disable_unprepare(mdp4_kms->pclk);
+	if (mdp4_kms->lut_clk)
+		clk_disable_unprepare(mdp4_kms->lut_clk);
+	if (mdp4_kms->axi_clk)
+		clk_disable_unprepare(mdp4_kms->axi_clk);
+
+	return 0;
+}
+
+int mdp4_enable(struct mdp4_kms *mdp4_kms)
+{
+	DBG("");
+
+	clk_prepare_enable(mdp4_kms->clk);
+	if (mdp4_kms->pclk)
+		clk_prepare_enable(mdp4_kms->pclk);
+	if (mdp4_kms->lut_clk)
+		clk_prepare_enable(mdp4_kms->lut_clk);
+	if (mdp4_kms->axi_clk)
+		clk_prepare_enable(mdp4_kms->axi_clk);
+
+	return 0;
+}
+
+
+static int mdp4_modeset_init_intf(struct mdp4_kms *mdp4_kms,
+				  int intf_type)
+{
+	struct drm_device *dev = mdp4_kms->dev;
+	struct msm_drm_private *priv = dev->dev_private;
+	struct drm_encoder *encoder;
+	struct drm_connector *connector;
+	struct device_node *panel_node;
+	int dsi_id;
+	int ret;
+
+	switch (intf_type) {
+	case DRM_MODE_ENCODER_LVDS:
+		/*
+		 * bail out early if there is no panel node (no need to
+		 * initialize LCDC encoder and LVDS connector)
+		 */
+		panel_node = of_graph_get_remote_node(dev->dev->of_node, 0, 0);
+		if (!panel_node)
+			return 0;
+
+		encoder = mdp4_lcdc_encoder_init(dev, panel_node);
+		if (IS_ERR(encoder)) {
+			DRM_DEV_ERROR(dev->dev, "failed to construct LCDC encoder\n");
+			of_node_put(panel_node);
+			return PTR_ERR(encoder);
+		}
+
+		/* LCDC can be hooked to DMA_P (TODO: Add DMA_S later?) */
+		encoder->possible_crtcs = 1 << DMA_P;
+
+		connector = mdp4_lvds_connector_init(dev, panel_node, encoder);
+		if (IS_ERR(connector)) {
+			DRM_DEV_ERROR(dev->dev, "failed to initialize LVDS connector\n");
+			of_node_put(panel_node);
+			return PTR_ERR(connector);
+		}
+
+		priv->encoders[priv->num_encoders++] = encoder;
+		priv->connectors[priv->num_connectors++] = connector;
+
+		break;
+	case DRM_MODE_ENCODER_TMDS:
+		encoder = mdp4_dtv_encoder_init(dev);
+		if (IS_ERR(encoder)) {
+			DRM_DEV_ERROR(dev->dev, "failed to construct DTV encoder\n");
+			return PTR_ERR(encoder);
+		}
+
+		/* DTV can be hooked to DMA_E: */
+		encoder->possible_crtcs = 1 << 1;
+
+		if (priv->hdmi) {
+			/* Construct bridge/connector for HDMI: */
+			ret = msm_hdmi_modeset_init(priv->hdmi, dev, encoder);
+			if (ret) {
+				DRM_DEV_ERROR(dev->dev, "failed to initialize HDMI: %d\n", ret);
+				return ret;
+			}
+		}
+
+		priv->encoders[priv->num_encoders++] = encoder;
+
+		break;
+	case DRM_MODE_ENCODER_DSI:
+		/* only DSI1 supported for now */
+		dsi_id = 0;
+
+		if (!priv->dsi[dsi_id])
+			break;
+
+		encoder = mdp4_dsi_encoder_init(dev);
+		if (IS_ERR(encoder)) {
+			ret = PTR_ERR(encoder);
+			DRM_DEV_ERROR(dev->dev,
+				"failed to construct DSI encoder: %d\n", ret);
+			return ret;
+		}
+
+		/* TODO: Add DMA_S later? */
+		encoder->possible_crtcs = 1 << DMA_P;
+		priv->encoders[priv->num_encoders++] = encoder;
+
+		ret = msm_dsi_modeset_init(priv->dsi[dsi_id], dev, encoder);
+		if (ret) {
+			DRM_DEV_ERROR(dev->dev, "failed to initialize DSI: %d\n",
+				ret);
+			return ret;
+		}
+
+		break;
+	default:
+		DRM_DEV_ERROR(dev->dev, "Invalid or unsupported interface\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int modeset_init(struct mdp4_kms *mdp4_kms)
+{
+	struct drm_device *dev = mdp4_kms->dev;
+	struct msm_drm_private *priv = dev->dev_private;
+	struct drm_plane *plane;
+	struct drm_crtc *crtc;
+	int i, ret;
+	static const enum mdp4_pipe rgb_planes[] = {
+		RGB1, RGB2,
+	};
+	static const enum mdp4_pipe vg_planes[] = {
+		VG1, VG2,
+	};
+	static const enum mdp4_dma mdp4_crtcs[] = {
+		DMA_P, DMA_E,
+	};
+	static const char * const mdp4_crtc_names[] = {
+		"DMA_P", "DMA_E",
+	};
+	static const int mdp4_intfs[] = {
+		DRM_MODE_ENCODER_LVDS,
+		DRM_MODE_ENCODER_DSI,
+		DRM_MODE_ENCODER_TMDS,
+	};
+
+	/* construct non-private planes: */
+	for (i = 0; i < ARRAY_SIZE(vg_planes); i++) {
+		plane = mdp4_plane_init(dev, vg_planes[i], false);
+		if (IS_ERR(plane)) {
+			DRM_DEV_ERROR(dev->dev,
+				"failed to construct plane for VG%d\n", i + 1);
+			ret = PTR_ERR(plane);
+			goto fail;
+		}
+		priv->planes[priv->num_planes++] = plane;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(mdp4_crtcs); i++) {
+		plane = mdp4_plane_init(dev, rgb_planes[i], true);
+		if (IS_ERR(plane)) {
+			DRM_DEV_ERROR(dev->dev,
+				"failed to construct plane for RGB%d\n", i + 1);
+			ret = PTR_ERR(plane);
+			goto fail;
+		}
+
+		crtc  = mdp4_crtc_init(dev, plane, priv->num_crtcs, i,
+				mdp4_crtcs[i]);
+		if (IS_ERR(crtc)) {
+			DRM_DEV_ERROR(dev->dev, "failed to construct crtc for %s\n",
+				mdp4_crtc_names[i]);
+			ret = PTR_ERR(crtc);
+			goto fail;
+		}
+
+		priv->crtcs[priv->num_crtcs++] = crtc;
+	}
+
+	/*
+	 * we currently set up two relatively fixed paths:
+	 *
+	 * LCDC/LVDS path: RGB1 -> DMA_P -> LCDC -> LVDS
+	 *			or
+	 * DSI path: RGB1 -> DMA_P -> DSI1 -> DSI Panel
+	 *
+	 * DTV/HDMI path: RGB2 -> DMA_E -> DTV -> HDMI
+	 */
+
+	for (i = 0; i < ARRAY_SIZE(mdp4_intfs); i++) {
+		ret = mdp4_modeset_init_intf(mdp4_kms, mdp4_intfs[i]);
+		if (ret) {
+			DRM_DEV_ERROR(dev->dev, "failed to initialize intf: %d, %d\n",
+				i, ret);
+			goto fail;
+		}
+	}
+
+	return 0;
+
+fail:
+	return ret;
+}
+
+static void read_mdp_hw_revision(struct mdp4_kms *mdp4_kms,
+				 u32 *major, u32 *minor)
+{
+	struct drm_device *dev = mdp4_kms->dev;
+	u32 version;
+
+	mdp4_enable(mdp4_kms);
+	version = mdp4_read(mdp4_kms, REG_MDP4_VERSION);
+	mdp4_disable(mdp4_kms);
+
+	*major = FIELD(version, MDP4_VERSION_MAJOR);
+	*minor = FIELD(version, MDP4_VERSION_MINOR);
+
+	DRM_DEV_INFO(dev->dev, "MDP4 version v%d.%d", *major, *minor);
+}
+
+struct msm_kms *mdp4_kms_init(struct drm_device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev->dev);
+	struct mdp4_platform_config *config = mdp4_get_config(pdev);
+	struct msm_drm_private *priv = dev->dev_private;
+	struct mdp4_kms *mdp4_kms;
+	struct msm_kms *kms = NULL;
+	struct msm_gem_address_space *aspace;
+	int irq, ret;
+	u32 major, minor;
+
+	mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL);
+	if (!mdp4_kms) {
+		DRM_DEV_ERROR(dev->dev, "failed to allocate kms\n");
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	mdp_kms_init(&mdp4_kms->base, &kms_funcs);
+
+	priv->kms = &mdp4_kms->base.base;
+	kms = priv->kms;
+
+	mdp4_kms->dev = dev;
+
+	mdp4_kms->mmio = msm_ioremap(pdev, NULL, "MDP4");
+	if (IS_ERR(mdp4_kms->mmio)) {
+		ret = PTR_ERR(mdp4_kms->mmio);
+		goto fail;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		ret = irq;
+		DRM_DEV_ERROR(dev->dev, "failed to get irq: %d\n", ret);
+		goto fail;
+	}
+
+	kms->irq = irq;
+
+	/* NOTE: driver for this regulator still missing upstream.. use
+	 * _get_exclusive() and ignore the error if it does not exist
+	 * (and hope that the bootloader left it on for us)
+	 */
+	mdp4_kms->vdd = devm_regulator_get_exclusive(&pdev->dev, "vdd");
+	if (IS_ERR(mdp4_kms->vdd))
+		mdp4_kms->vdd = NULL;
+
+	if (mdp4_kms->vdd) {
+		ret = regulator_enable(mdp4_kms->vdd);
+		if (ret) {
+			DRM_DEV_ERROR(dev->dev, "failed to enable regulator vdd: %d\n", ret);
+			goto fail;
+		}
+	}
+
+	mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk");
+	if (IS_ERR(mdp4_kms->clk)) {
+		DRM_DEV_ERROR(dev->dev, "failed to get core_clk\n");
+		ret = PTR_ERR(mdp4_kms->clk);
+		goto fail;
+	}
+
+	mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk");
+	if (IS_ERR(mdp4_kms->pclk))
+		mdp4_kms->pclk = NULL;
+
+	mdp4_kms->axi_clk = devm_clk_get(&pdev->dev, "bus_clk");
+	if (IS_ERR(mdp4_kms->axi_clk)) {
+		DRM_DEV_ERROR(dev->dev, "failed to get axi_clk\n");
+		ret = PTR_ERR(mdp4_kms->axi_clk);
+		goto fail;
+	}
+
+	clk_set_rate(mdp4_kms->clk, config->max_clk);
+
+	read_mdp_hw_revision(mdp4_kms, &major, &minor);
+
+	if (major != 4) {
+		DRM_DEV_ERROR(dev->dev, "unexpected MDP version: v%d.%d\n",
+			      major, minor);
+		ret = -ENXIO;
+		goto fail;
+	}
+
+	mdp4_kms->rev = minor;
+
+	if (mdp4_kms->rev >= 2) {
+		mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk");
+		if (IS_ERR(mdp4_kms->lut_clk)) {
+			DRM_DEV_ERROR(dev->dev, "failed to get lut_clk\n");
+			ret = PTR_ERR(mdp4_kms->lut_clk);
+			goto fail;
+		}
+		clk_set_rate(mdp4_kms->lut_clk, config->max_clk);
+	}
+
+	pm_runtime_enable(dev->dev);
+	mdp4_kms->rpm_enabled = true;
+
+	/* make sure things are off before attaching iommu (bootloader could
+	 * have left things on, in which case we'll start getting faults if
+	 * we don't disable):
+	 */
+	mdp4_enable(mdp4_kms);
+	mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0);
+	mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0);
+	mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0);
+	mdp4_disable(mdp4_kms);
+	mdelay(16);
+
+	if (config->iommu) {
+		struct msm_mmu *mmu = msm_iommu_new(&pdev->dev,
+			config->iommu);
+
+		aspace  = msm_gem_address_space_create(mmu,
+			"mdp4", 0x1000, 0x100000000 - 0x1000);
+
+		if (IS_ERR(aspace)) {
+			if (!IS_ERR(mmu))
+				mmu->funcs->destroy(mmu);
+			ret = PTR_ERR(aspace);
+			goto fail;
+		}
+
+		kms->aspace = aspace;
+	} else {
+		DRM_DEV_INFO(dev->dev, "no iommu, fallback to phys "
+				"contig buffers for scanout\n");
+		aspace = NULL;
+	}
+
+	ret = modeset_init(mdp4_kms);
+	if (ret) {
+		DRM_DEV_ERROR(dev->dev, "modeset_init failed: %d\n", ret);
+		goto fail;
+	}
+
+	mdp4_kms->blank_cursor_bo = msm_gem_new(dev, SZ_16K, MSM_BO_WC | MSM_BO_SCANOUT);
+	if (IS_ERR(mdp4_kms->blank_cursor_bo)) {
+		ret = PTR_ERR(mdp4_kms->blank_cursor_bo);
+		DRM_DEV_ERROR(dev->dev, "could not allocate blank-cursor bo: %d\n", ret);
+		mdp4_kms->blank_cursor_bo = NULL;
+		goto fail;
+	}
+
+	ret = msm_gem_get_and_pin_iova(mdp4_kms->blank_cursor_bo, kms->aspace,
+			&mdp4_kms->blank_cursor_iova);
+	if (ret) {
+		DRM_DEV_ERROR(dev->dev, "could not pin blank-cursor bo: %d\n", ret);
+		goto fail;
+	}
+
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+	dev->mode_config.max_width = 2048;
+	dev->mode_config.max_height = 2048;
+
+	return kms;
+
+fail:
+	if (kms)
+		mdp4_destroy(kms);
+	return ERR_PTR(ret);
+}
+
+static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev)
+{
+	static struct mdp4_platform_config config = {};
+
+	/* TODO: Chips that aren't apq8064 have a 200 Mhz max_clk */
+	config.max_clk = 266667000;
+	config.iommu = iommu_domain_alloc(&platform_bus_type);
+
+	return &config;
+}